JPS6229263B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a semiconductor control switch for an electric remote control mirror.

The electric remote control mirror has a so-called 1 mirror that directs the left and right mirrors vertically or horizontally using one motor and one solenoid, respectively.
There is a motor type type and a two-motor type type in which the left and right mirrors are directed vertically or horizontally by a vertical direction motor and a left and right direction motor, respectively, but in either case, the control is by a mechanical switch. It is being carried out. Fig. 1 shows an example of the above-mentioned mechanical switch, in which the required switch mechanism is built into box a, and the switch mechanism, left mirror operating shaft b, and right mirror operating shaft c are shown.
For example, when you want to direct the left mirror up and down, tilt the operating shaft b upward, and the sliding contact in box a will selectively contact the upward drive contact of the left mirror, causing the left mirror to move up and down. The motor is driven so that the mirror faces upward, and when the operating shaft b is returned to the neutral position, the sliding contact is returned to the neutral position by a spring and maintained at that position.

However, in conventional switches such as those described above, since the driving current flows directly through the contact portion, the contact portion must have a large current capacity, which inevitably results in a large contact portion and a complicated operation mechanism. Since the operation box requires a large section, the shape of the operation box becomes large, and the operation shafts b and c protrude, which is dangerous if the driver falls forward.

The inventor of the present invention has improved on these points, and is compact and does not protrude like the conventional operation shaft, and the contact part is small and thin, and only a small current for semiconductor circuit control flows, resulting in outstanding durability. We previously proposed a switch device for electrically operated remote control mirrors.

The present invention basically utilizes the earlier invention, but as a result of making the contact portion small and thin, it is conceivable that a fingertip or the like may accidentally press multiple direction designation switches. This makes it possible to make contact closing in only one direction effective, thereby simplifying the structure of the switch part and improving reliability.

In order to achieve the above objects, the present invention has the following features:
A direction designation switch that designates the vertical and horizontal directions; a semiconductor switching circuit that selectively drives a drive unit such as a motor according to the designation of each direction designation switch; In a switch device for an electric remote control mirror comprising a changeover switch for switching to one side, a priority circuit comprising a resistor and a transistor is connected between the semiconductor switching circuit and the direction designation switch, and a plurality of the direction designation switches are connected. The feature is that when the power is turned on, one of them is selected preferentially to drive a motor or the like. An example of the implementation of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 is a block diagram of the switching device of the present invention, in which 1 is an operation switch, 2 is a priority circuit, 3 is a semiconductor switching circuit, 4 is, for example, a right-hand remote control mirror, 5 is a left-hand remote control mirror, and SW ₅ is a left and right switch. A manual switch for switching the mirrors is shown, and the left and right remote control mirrors are each equipped with a motor or a drive device including a motor and a solenoid, as described later. The operation switches are common to the left and right mirrors, for example, a right direction designation switch SW ₁ , a left direction designation switch SW ₂ , a down direction designation switch SW ₃ ,
Equipped with switch SW ₄ for upward direction designation. These direction specifying switches are of minute current capacity, such as touch switches, as will be described later.

FIG. 3 is a circuit diagram showing a specific example in which the present invention is applied to a one-motor type remote control mirror. In FIG. 3, SW ₁ to _{SW 4} are the direction specifying switches, SW ₅ is the left and right mirror switching switch, and C ₁ is the left/right mirror switching switch.
is a capacitor for preventing noise from the power supply, R ₁ ~
_R4 is a resistor, _Tr1 to _Tr4 are transistors that are semiconductor switches for driving the motor, _Tr5 is a transistor that is a semiconductor switch for driving a solenoid, M _L
is a motor for the left mirror, M _R is a motor for the right mirror, S _L is a solenoid for the left mirror, and S _R is a solenoid for the right mirror. Also, resistance
_R4 and transistor _Tr6 are priority circuits connected between the direction specifying switch and the semiconductor switching circuit, and in the illustrated embodiment are connected as follows. That is, the transistor
Tr ₆ has its collector connected to the power supply via resistor R ₄ , the connection point between the collector and resistor R ₄ is connected to the input side terminals of direction specifying switches SW ₁ and SW ₃ , and the base is connected to the direction specifying switch SW 1 and SW 3. It is connected to the output side of SW ₂ and SW ₄ , and also connected to the base of transistor Tr ₃ , and its emitter is grounded.

Therefore, when the direction specifying switch SW ₂ or SW ₄ is pressed, the transistor Tr 6 turns on at the same time as the transistor Tr ₃ turns on, so the transistor Tr ₆ turns on _.
The collector potential of the transistor becomes almost zero, and even if the direction specifying switch SW ₁ or SW ₃ is pressed, the transistor
The configuration is such that Tr ₄ and Tr ₅ do not turn on.

Next, the operation in the above configuration will be explained. If you want to move the right mirror, first move switch SW ₅ to the M _R side.

If you want to move it to the right, press direction switch SW ₁ . Then, a positive voltage is applied to the base of transistor Tr ₄ via resistor R ₄ and switch SW ₁ , turning on transistor Tr ₄ , and turning on transistor Tr ₄ turns on transistor Tr ₁ via resistor R ₁ . . Therefore,
The motor M _R for the right side mirror has →Tr ₁ →SW ₅
A current flows in the order of →M _R →Tr ₄ →ground, and the motor M _R rotates to deflect the mirror to the right.

Conversely, if you want to move it too far to the left, press switch SW ₂ .
When you press the transistor Tr ₃ through the resistor R ₃ ,
A positive voltage is applied to the base of Tr ₆ , which turns on transistors Tr ₃ and Tr ₆ , and turns transistor Tr ₃ on.
When turned on, base current flows to the transistor Tr ₂ via the resistor R ₂ , and the transistor Tr ₂ is also turned on.

Therefore, for the right mirror motor M _R , →
A current is applied in the order of Tr ₂ → M _R → SW ₅ → Tr ₃ → Earth to reverse the motor M _R and deflect the mirror to the left.

When the downward movement is desired, pressing switch SW ₃ turns on transistors Tr ₁ and Tr ₄ in the same way as when pressing switch SW ₁ , rotating the motor M _R and at the same time turning on the base of transistor Tr ₅ . Apply a positive voltage to turn on transistor Tr ₅ ,
This activates the solenoids S _R and S _L , which engages the clutch inside the remote control mirror to deflect the mirror downward.

When it is desired to move the mirror upward, pressing the switch SW ₄ causes the motor M _R to reverse in the same manner as described above and at the same time activates the solenoid to deflect the mirror upward.

If you need to move the left mirror too much, move the switch SW ₅ to the M _L side and use the same method as above.
By pressing SW ₁ ~ SW ₄ , move the left mirror to the right.
It can be moved left, down, and up.

Next, the operation of the priority circuit consisting of the low resistance _R4 and the transistor _Tr6 will be explained.

If you accidentally press switch SW ₃ while pressing switch SW ₂ to turn the mirror to the left, pressing switch SW ₂ will turn on transistor Tr ₆ as described above. The potential at point a in the figure is almost 0. Therefore, even if switch SW ₃ is pressed in this state, transistor Tr ₄ cannot be turned on, and transistors Tr ₁ and Tr ₅ cannot be turned on.
does not turn on, so pressing switch SW ₃ is invalidated, and the mirror continues to turn left and right.

Also, consider a case where switch SW ₁ is pressed and switch SW ₄ is pressed at the same time. In this case, press switch SW ₄ to connect transistor Tr ₁ ,
When Tr ₄ was turned on, the mirror was deflected to the right, but when switch SW ₄ was subsequently pressed, transistor Tr ₆ was turned on and the potential at point a became close to 0, so transistors Tr ₁ , Tr ₄ is turned off, and at the same time, switch SW ₄ turns off the transistor.
Since Tr ₂ and Tr ₃ are turned on and transistor Tr ₅ is turned on, the mirror stops turning to the right and turns upward. That is, in this case, the upward direction has priority over the right direction.

Also, when switches SW ₁ to SW ₄ are pressed at the same time, transistors Tr ₂ , Tr ₃ , Tr ₅ , and Tr ₆ are turned on and Tr ₁ and Tr ₄ are turned off, so the motor rotates in reverse and the mirror moves upward. Shift to

As described above, the embodiment shown in FIG. 3 shows an example in which the priority order is upward>left>downward>right, but this priority may be changed to any desired order by replacing the switch. It can be changed as follows.

As described above, the switch device of the present invention has the following features:
Since the electric remote control mirror's motor or motor and solenoid are driven by a semiconductor switching circuit, its lifespan is semi-permanently extended compared to those using conventional mechanical switches, and the direction indicator switch requires no drive current. Since no current flows, it is of course possible to use a proximity switch, touch switch, or other device with a small current capacity to make it extremely small and thin.
In particular, in the present invention, a priority circuit is provided when multiple direction indicating switches are pressed, so even if multiple direction indicating switches are pressed by mistake, the mirror can be changed without any problem. It is possible to simplify the process and improve reliability.

[Brief explanation of the drawing]

Fig. 1 is an external view showing an example of a conventional switching device, Fig. 2 is a block diagram of a switching device according to the present invention, and Fig. 3 is a circuit diagram showing an example in which the present invention is applied to a one-motor type remote control mirror. It is. 1...Operation switch, SW ₁ to _{SW 4} ...Direction switch, 2...Priority circuit, 3...Semiconductor switching circuit, 4...Left side remote control mirror, 5...Right side remote control mirror,
SW ₅ ... Left and right mirror changeover switch, M _L ... Motor for left mirror, M _R ... Motor for right mirror,
S _L , S _R ... Solenoid, C ₁ ... Capacitor,
_R1 to _R4 ...Resistor, _Tr1 to _Tr6 ...Transistor.

Claims (1)

[Claims] 1. A direction designation switch that designates the vertical and horizontal directions, a semiconductor switching circuit that selectively drives a drive unit such as a motor according to the designation of each direction designation switch, and a semiconductor switching circuit that connects the left and right mirrors. In a switch device for an electric remote control mirror comprising a changeover switch for switching to either side, a priority circuit comprising a resistor and a transistor is connected between the semiconductor switching circuit and the direction designation switch, and the direction designation switch is A switch device for an electric remote control mirror, characterized in that when a plurality of switches are input, one of them is selected preferentially to drive a motor, etc.